Best estimates are that about 15% to 20% of the world's economy happens off the books. Journalist Mischa Glenny takes a tour of the underground economy in his new book, "McMafia." He talks about it with Kai Ryssdal.

A new survey says most middle-class Americans are worse off financially today than they were four years ago. Kai Ryssdal talks with David Leonhardt of The New York Times about the squeeze middle-class families are feeling.

American Airlines canceled more than 1,000 flights today for safety checks on its planes, as part of the FAA's recent crackdown on airline safety. Ashley Milne-Tyte reports on how much these cancellations will cost airlines and travelers.

Unconfirmed reports say Citigroup is close to selling $12 billion in loans, at a sizable loss, that it wants to get off its books. How much are bad loans worth and why would anyone buy them? Bob Moon reports.